220887906 has 16 divisors (see below), whose sum is σ = 460983744. Its totient is φ = 70427984.

The previous prime is 220887859. The next prime is 220887913. The reversal of 220887906 is 609788022.

It is a happy number.

220887906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800181 + ... + 800456.

It is an arithmetic number, because the mean of its divisors is an integer number (28811484).

Almost surely, 2^220887906 is an apocalyptic number.

220887906 is an abundant number, since it is smaller than the sum of its proper divisors (240095838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220887906 is a wasteful number, since it uses less digits than its factorization.

220887906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600665.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 220887906 is about 14862.2981399244. The cubic root of 220887906 is about 604.4921230077.

The spelling of 220887906 in words is "two hundred twenty million, eight hundred eighty-seven thousand, nine hundred six".